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 SELECT max(SYS_CONNECT_BY_PATH(COLUMN_NAME, ','))
  from (SELECT A.COLUMN_NAME, ROWNUM AS ROWNO
          from USER_TAB_COLUMNS A
         WHERE TABLE_NAME = 'A_USER'
         order by a.COLUMN_ID)
start with ROWNO = 1
connect by ROWNO = rownum;


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create or replace procedure P_QuerySplit(
      sqlscript varchar2,     --±íÃû/SQLÓï¾ä
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set pagesize 0
set long 90000
set feedback off
set echo off
spool DEPT.sql
select dbms_metadata. ......

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 1.GSD global services daemon 
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The Global Services Daemon (GSD) runs on each node with one GSD process per node. The GSD coordinates with the cluster manager to receive requests from clients such as the DBCA, EM, and the SRVCTL utility to execute administrative ......
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